Bone shaping and threading device



K. STOYE BONE SHAPING AND THREADING DEVICE Aug. 18, 1925.

Filed June 7; 19 3 2 Sheets-Sheet 1 lyENTOR 5. v oum'ro NEY.

Aug. 18, 1925. 1,550,400

7 K. STOYE BONE SHAPING AND THREADLNQ DEVICE Filed June '7. 19 3 2 Sheets-Shoot 2 VENTOR Patented Aug. 18, 1925.

UNITED STATES 1,550,400 PATENT OFFICE.

KURT sToYE, or r sHInG, NEW YORK, Assrenon ro THE KNY-SCHEERER conrona- 'TION OF AM RICA, ornnwyoax, n. Y., A CORPORATION or NEW YORK.

BONE SHAPING AND THREADING.DEVICE.

imam filed June 7, 1923. Serial No. 643,837.

To all whom it may. concern: Be it known that I, KURT SToYn, a citizen of the United States, residing at 266 Central Avenue, Flushing, Long Island, in the county ofQueens and State of New; York,

have invented certain new and usefulImprovements in Bone Shapingand Threading Devices, of which the following is, a Specification. I

This invention relates, to bone shaping and threading devices,,a'nd the novelty consists 'in-the adaptation and arrangement of theparts, as will be more. fullyhereinafter pointed out. i r

In the treatment of various bone frac tures and in the'setting of new pieces of bone, which .areusually cut from the shin of the person being treated,'it is very, often found necessary topinthe piece of bone which is ibeingiinlaidjto the surrounding bone tissue 'where-"it is placed in order to assurefthe inlaid pieces staying in exact position and growing exactly into that position.

,-:Many different substances have been tried ifonypinning together such ;bone,'members, including the use ofaprepared beef bone pin'swhich come prepared and sterilized for thispurpose, but which do notreadily knit with the human bone as will a piece of boneof theperson being treated which is of a finer textureand harder thanthe bfeefbone.

There has therefore come to be, atremendous demand for a'properlv threaded pin" or screw of humanbone for use in pinning :togeth'er the new bone or inlay-with the surrounding bone into which such inlay is-placed, and'in order-to be sureof perfect knitting it is now recognized by the medical profession that it-is necessary to use a bone pin or screw taken fromjtheperson being .treated the -same as the inlayr -is takenusually from the shin of the person being treated. H I

This must all be done under'the usual sterile conditions of the operating-room, and must be done quickly as the operation is necessarily a long one and every minute counts. 'My device is adapted to solve this problem, being adapted to shape a piece of bone cut from the person .being treated and threading the same 'in the same device without loss of time and all under the sterile conditions required in such operations. Referring to the ,drawings, Figure 1 is a side View of one embodiment of my device; Figure 2 is a top plan view. of the device shown in Figure 1 with a portion offthe casing cut away in order to show the interior construction.

I11 the drawings 5' is a base member having rigid brackets 6 secured thereto adapts ed to'support and hold rigidly in position a motor 7 of usual construction for the purpose herein stated and having the usual sterilizable and removable shell, which momounted on the base 5 by means of a bracket 13' rigidly secured to the casing 12, which is adapted toslide into slots 14 in base brackets 15 which are rigidly secured to the base member 5 at 16. Y

. In the simpler form of my construction shown in Figures 1 and 2 the shaft 11 passes'through bearing 13 integral with the casing 12. so that at the outer end said shaft 7 11 rests in 14 also integral with the easing 12. {On the shaft 11 is a worm 15 which meshes with a worm gear 16 which is rigidly secured to a shaft 17 15 supported at 18 in the casing12, and on which shaft 17 at the other end is rigidly secured a bevel gear 19 whlch 1s a driving gear. Pivoted one hollow pin 20-supported in one side of, the casing '12 is a bevel gear 21 which is always in meshwiththe driving gear 19. On the other sideof the casing 12 from 20 is another bevel gear 22 which is sup ported on a hollow pin-23 in the side of the casing;.12, and the bevel gear 22 is also in mesh with the driving gear 19 so that gears 21 and 22 always travel in opposite directions because of the'driving gear 19 with which they are always in mesh. A

shaft 24: is mounted in the hollow pins 20 and 23 so that it will rotate freely therein,

and the shaft 24 carries a sleeve 25 integral therewith which has cut-outs 26 and 27 adapted to engage pins 28 and 29 respectively on bevel gears 22 and 21. A shaper or thread cutter may be mounted on the shaft 2st so as to rotate therewith, said shaper or thread cutter being interchangeable. The operation of the construction described and shown is such that as the motor 7 is set in operation the wheel 10 is thereby rotated and the worm drive 15 on the integral shaft 11 is also rotated. The worm drive 15 being in mesh with the worm gear 16 thereby sets that in operation, which in turn causes the rotation of the bevel gear or driving gear 19. As the bevel gear 19 rotates the two bevel gears 21 and 22 which are always in mesh with the driving gear 15) also rotate in opposite directions. Vvith the shaper or thread cutter 30 in position on the shaft 24: as the bone to be shaped or the bone pin to be threaded is pressed into the member 30, the shaft 2lcarrying the sleeve 25 will press the sleeve 25 until the cut-out 27 engages the pin 29, where upon 30 will be driven in the direction of the gear 21. As the bone being cut or threaded is completed the operator as he pulls the same back will cause the shaft 24 and the sleeve 25 to pull outwardly so that the cut-out 26 will register with the pin 28, thereby causing the shaft 2st to rotate in the opposite direction and with the bevel gear 22 thereby turning out the bone pin in its completed shape as a pin or completely threaded as a screw accordin to which device 30 is in position for use. A dowel shaper 30 may be attached directly to shaft 11 thereby permitting the same to be run at a higher speed than it is possible if mounted as previously de-' scribed.

Thus a threaded pin or bolt of the patients own bone is quickly and easily prepared under absolutely sterile conditions so that it can be used immediately in securing together the inlaid portion with the surrounding bone material so as to effect a. perfect growth of the bone material together in the exact position required.

I claim: 7

1. In an automatic bone cutting machine means for shaping and threading the bone when out comprising a. casing separately attachable to said machine and containing a shaft driven by said machine, a worm gear mounted on said shaft, a second shaft mounted in said casing in a horizontal plane and crosswise of said first shaft, a worm gear mounted on said second shaft so as to mesh with said worm gear, :1 bevel gear mounted on the outer end of said second shaft, a pair of bevel gears mounted in said machine with said first bevel gear so that they are driven in opposite directions thereby, a bone shaper moimted on a third shaft running through said pair of bevel gears, and means for engaging said third shaft with either of said pair of gears alternately.

2. In an automatic bone cutting machine means for shaping and threading the bone when cut comprising a casing separably attachable to said machine and containing a shaft driven by said machine, a. worm gear mounted on said shaft, a second shaft mounted in said casing in a horizontal plane above and crosswise of said first shaft, a worm gear mounted on said second shaft so as to mesh with said worm gear, a bevel gear mounted on the outer end of said second shaft, a pair of bevel gears mounted in said machine with said first bevel gear so that they are driven in opposite directions thereby, a bone shaper mounted on a third shaft running through said pair of bevel gears, and means for engaging said third shaft with either of said pair of gears alternately, consisting of a sleeve rigidly secured to said shaft having cut-outs adapt-- ed to engage pins on said pair of bevel gears.

3. In an automatic bone cutting machine means for shaping and threading the bone when out comprising a casing separably attachable to said machine and containing a shaft driven by said machine, a worm gear mounted on said shaft, a second shaft mounted in said casing in a horizontal plane above and crosswise of said first shaft, a worm gear mounted on said second shaft so as to mesh with. said worm gear, abevel gear mounted on the outer end of said second shaft, a pair of bevel gears mounted in said machine with said first bevel gear so that they are driven in opposite directions thereby, a bone shaper mounted on a third shaft running through said pair of bevel gears,-and means for engaging said third shaft with either of said pair of gears alternately, and a base member adapted to support all.

4. In an automatic bone cutting machine means for shaping and threading the bone when out comprising a casing sepa-ra-bly att-achable to said machine and containing a shaft driven by said machine, a worm gear mounted on said shaft, a second shaft mounted in said casing in a horizontal plane above and crosswise of said first shaft, a worm gear mounted on said second shaft so as to mesh with said worm gear, a bevel gear mounted on the outer end of said second shaft, a pair of bevel gears mounted in said machine with said first bevel gear so that they are driven in opposite directions thereby, a bone shaper mounted on a third shaft running through said pair of bevel gears, and means for engaging said third shaft with either of said pair of gears alternately, consisting of a sleeve rigidly secured to said shaft having cut-outs adapted to engage pins on said pair of bevel gears, and a base member adapted to support all,

5. In an automatic bone cutting machine means for shaping and threading the bone when out comprising a casing separably attachable to said machine and containing a shaft driven by said machine, a second shaft having a bevel gear, said shaft being driven by suitable means from the first shaft, a third shaft carrying a pair of bevel gears mounted in mesh with said bevel gears so that they are driven in opposite direc tions thereby, a bone shaper mounted on a shaft running through said pair of bevel gears, and means for engaging said bone shaper shaft with either of said pair of gears alternately.

6. In an automatic bone cutting machine means for shaping and threading the bone when out comprising a casing separably attachable to said machine and containing a shaft driven by said machine, a second shaft having a bevel gear, said shaft being driven by suitable means from the first shaft, a third shaft carrying a. pair of bevel gears mounted in mesh With said bevel gears so that they are driven in opposite directions thereby, a bone shaper mounted on a shaft running through said pair of bevel gears, means for engaging said bone shaper shaft With either of said pairof gears alternately, and a base member adapted to support all. v

' In testimony whereof I affix my signature.

KURT STOYE. 

